{"id":7666,"date":"2026-09-07T02:28:56","date_gmt":"2026-09-07T02:28:56","guid":{"rendered":"https:\/\/chinametalfoundry.com\/?p=7666"},"modified":"2026-09-07T02:40:31","modified_gmt":"2026-09-07T02:40:31","slug":"how-to-choose-casting-alloy","status":"publish","type":"post","link":"https:\/\/chinametalfoundry.com\/pl\/blog\/how-to-choose-casting-alloy\/","title":{"rendered":"Jak wybra\u0107 stop odlewniczy: wytrzyma\u0142o\u015b\u0107, odporno\u015b\u0107 na korozj\u0119 i koszt"},"content":{"rendered":"<article class=\"sc-article\" style=\"max-width: 820px; margin: 0 auto; font-family: 'Poppins',sans-serif; color: #7e7e7e; font-size: 16px; line-height: 1.7;\">\n<div class=\"sc-intro\" style=\"background: #F5F5F5; border-radius: 20px; padding: 22px 24px; font-style: italic; color: #3a3a3a; margin: 0 0 26px; line-height: 1.6;\">\n<p style=\"margin: 0;\">The most expensive mistake in metal casting is not a bad mold or a wrong tolerance \u2014 it is picking an alloy that is either over-specced (you pay for strength you never use) or under-specced (you ship parts that fail in the field). Getting <strong style=\"color: #273171;\">casting alloy selection<\/strong> right at the RFQ stage is what separates a profitable program from a scrap-and-rework spiral.<\/p>\n<\/div>\n<p style=\"margin: 0 0 18px;\">This guide walks procurement engineers and product designers through a practical casting alloy selection method &#8211; a way to choose among the common cast alloys \u2014 gray iron, ductile iron, carbon steel, stainless steel, aluminum, and zinc \u2014 using real mechanical numbers and shop-floor cost logic rather than catalog marketing. Reference points come from <a style=\"color: #086ad4; text-decoration: none;\" href=\"https:\/\/www.afsinc.org\" target=\"_blank\" rel=\"noopener\">AFS<\/a> alloy selection guidance and <a style=\"color: #086ad4; text-decoration: none;\" href=\"https:\/\/www.astm.org\" target=\"_blank\" rel=\"noopener\">ASTM<\/a> material standards.<\/p>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">Why Casting Alloy Selection Goes Wrong<\/h2>\n<p style=\"margin: 0 0 18px;\">Most alloy mistakes come from one of three shortcuts:<\/p>\n<ul style=\"margin: 0 0 18px; padding-left: 22px;\">\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Copying a spec from an old drawing<\/strong> \u2014 the original alloy was chosen decades ago for a different load, and nobody re-validated it.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Specifying the strongest alloy &#8220;to be safe&#8221;<\/strong> \u2014 stainless where ductile iron would do, driving up cost and lead time for no functional gain.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Ignoring the environment<\/strong> \u2014 a carbon steel part placed in a wet or mildly corrosive application and left uncoated.<\/li>\n<\/ul>\n<p style=\"margin: 0 0 18px;\">A sound selection weighs three axes at once: <strong style=\"color: #273171;\">mechanical strength, corrosion resistance, and total cost<\/strong>. The table below maps the main cast alloys against all three.<\/p>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">The Casting Alloy Family Tree<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 18px 0 24px; font-size: 15px; color: #333333;\">\n<thead>\n<tr>\n<th style=\"background: #273171; color: #ffffff; padding: 12px 14px; text-align: left; font-weight: 600; border: 1px solid #273171;\">Alloy<\/th>\n<th style=\"background: #273171; color: #ffffff; padding: 12px 14px; text-align: left; font-weight: 600; border: 1px solid #273171;\">Tensile (ksi)<\/th>\n<th style=\"background: #273171; color: #ffffff; padding: 12px 14px; text-align: left; font-weight: 600; border: 1px solid #273171;\">Corrosion<\/th>\n<th style=\"background: #273171; color: #ffffff; padding: 12px 14px; text-align: left; font-weight: 600; border: 1px solid #273171;\">Relative Cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">Gray Iron<\/strong> (A48 Cl 20\u201360)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">20\u201360<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Poor (rusts)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Lowest<\/td>\n<\/tr>\n<tr style=\"background: #F5F5F5;\">\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">\u017beliwo sferoidalne<\/strong> (A536 65-45-12)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">65\u2013100<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Poor\u2013Fair<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Low<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">Carbon Steel<\/strong> (A216 WCB)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">70\u201395<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Poor (rusts)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Medium<\/td>\n<\/tr>\n<tr style=\"background: #F5F5F5;\">\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">Stal nierdzewna<\/strong> (CF8 \/ CF8M)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">~75<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">\u015awietnie<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Wysoki<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">Aluminium<\/strong> (A356-T6)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">~40<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Dobrze<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Medium\u2013High<\/td>\n<\/tr>\n<tr style=\"background: #F5F5F5;\">\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\"><strong style=\"color: #273171;\">Zinc<\/strong> (Zamak 3)<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">~41<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Targi<\/td>\n<td style=\"border: 1px solid #E5E5E5; padding: 10px 14px;\">Low per part<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin: 0 0 18px;\">Tensile strength is only the headline number in casting alloy selection. Ductile iron, for example, matches many carbon steel grades on strength but costs materially less and casts more cleanly in thin sections. The choice is rarely about &#8220;strongest wins.&#8221;<\/p>\n<figure style=\"margin: 24px 0;\"><img decoding=\"async\" style=\"width: 100%; display: block; border-radius: 4px;\" src=\"https:\/\/chinametalfoundry.com\/wp-content\/uploads\/2026\/09\/cast-alloy-samples-row.webp\" alt=\"Casting alloy selection \u2014 common cast metal samples side by side\" \/><figcaption style=\"font-size: 13px; color: #7e7e7e; text-align: center; margin-top: 8px;\">Gray iron, ductile iron, carbon steel, stainless, aluminum and zinc castings side by side.<\/figcaption><\/figure>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">Strength: Reading Mechanical Properties Without the Jargon<\/h2>\n<p style=\"margin: 0 0 18px;\">Four numbers tell you most of what you need for a static load application:<\/p>\n<ul style=\"margin: 0 0 18px; padding-left: 22px;\">\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Tensile strength (UTS)<\/strong> \u2014 the maximum pulling stress before fracture. Your design working stress should be a fraction of this, not near it.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Yield strength<\/strong> \u2014 where permanent deformation begins. Matters more than UTS for parts that must not distort in service.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Elongation (%)<\/strong> \u2014 how much it stretches before breaking. Gray iron is brittle (under 1%); ductile iron and steels are ductile (3\u201318%).<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Hardness<\/strong> \u2014 resistance to indentation; a proxy for machinability and wear resistance.<\/li>\n<\/ul>\n<p style=\"margin: 0 0 18px;\">A part under pure compression or with heavy vibration behaves differently from one under constant tension &#8211; which is why casting alloy selection cannot stop at a single tensile number Gray iron&#8217;s damping capacity and castability make it ideal for machine bases and housings despite its low elongation, while a load-bearing bracket that sees shock should lean toward ductile iron or steel. See our <a style=\"color: #086ad4; text-decoration: none;\" href=\"https:\/\/chinametalfoundry.com\/pl\/blog\/przewodnik-po-odlewaniu-metali\/\" target=\"_blank\" rel=\"noopener\">przewodnik po odlewaniu metali<\/a> for how the process choice interacts with alloy choice.<\/p>\n<h3 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 20px; font-weight: 600; line-height: 1.4; margin: 26px 0 8px; text-transform: capitalize;\">When to pay for extra strength<\/h3>\n<hr style=\"width: 100px; height: 4px; background: #EF890D; border: none; border-radius: 2px; margin: 0 0 14px; line-height: 0; opacity: 1;\" \/>\n<p style=\"margin: 0 0 18px;\">Upgrade only when the load or safety factor demands it. A pump housing carrying moderate internal pressure may run fine in gray iron for decades; the same housing in a high-pressure or cryogenic service should move to carbon steel or a stainless grade. Match the spec to the duty, not to fear.<\/p>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">Corrosion Resistance: Matching Alloy to Environment<\/h2>\n<p style=\"margin: 0 0 18px;\">Corrosion is where casting alloy selection quietly fails. The rule of thumb: <strong style=\"color: #273171;\">match the alloy to the service environment, then decide whether a coating closes the gap<\/strong>.<\/p>\n<ul style=\"margin: 0 0 18px; padding-left: 22px;\">\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Indoor \/ dry<\/strong> \u2014 gray iron, carbon steel, and zinc all survive; no premium needed.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Fresh water \/ humidity<\/strong> \u2014 ductile iron or carbon steel with a coating (paint, galvanizing, or powder coat); or stainless for wet contact.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Salt water \/ marine<\/strong> \u2014 316-type stainless (CF8M) or a corrosion-resistant aluminum grade; uncoated steel will fail quickly.<\/li>\n<li style=\"margin: 0 0 8px;\"><strong style=\"color: #273171;\">Chemical \/ high temperature<\/strong> \u2014 alloy steels and heat-resistant stainless grades selected per the specific media.<\/li>\n<\/ul>\n<figure style=\"margin: 24px 0;\"><img decoding=\"async\" style=\"width: 100%; display: block; border-radius: 4px;\" src=\"https:\/\/chinametalfoundry.com\/wp-content\/uploads\/2026\/09\/cast-alloy-corrosion.webp\" alt=\"Casting alloy selection \u2014 corrosion resistance comparison of steel castings\" \/><figcaption style=\"font-size: 13px; color: #7e7e7e; text-align: center; margin-top: 8px;\">A stainless casting and a coated carbon steel casting after exposure to a humid environment.<\/figcaption><\/figure>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">Cost: The Total-Weight vs Per-Part Trap<\/h2>\n<p style=\"margin: 0 0 18px;\">Buyers often compare alloys by price per kilogram and miss the real cost drivers of casting alloy selection. Aluminum costs more per kilogram than iron, yet an aluminum part can end up cheaper because it is a third of the weight and machines faster. Zinc costs more per kilogram too, but its low melting point enables high-cavitation die casting at very low per-part cost in volume.<\/p>\n<p style=\"margin: 0 0 18px;\">Three numbers actually decide unit cost: <strong style=\"color: #273171;\">raw material price, casting yield (melt weight vs finished part), and machining time<\/strong>. A harder alloy may save nothing if it doubles your tool wear and cycle time on the machine. When volume and geometry also matter, see our <a style=\"color: #086ad4; text-decoration: none;\" href=\"https:\/\/chinametalfoundry.com\/pl\/blog\/odlewanie-w-formach-piaskowych-a-odlewanie-metoda-woskowa\/\" target=\"_blank\" rel=\"noopener\">odlewanie w formach piaskowych a odlewanie metod\u0105 woskow\u0105<\/a> comparison for the process side of the decision.<\/p>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">A Practical Casting Alloy Selection Workflow<\/h2>\n<ol style=\"margin: 0 0 18px; padding-left: 22px;\">\n<li style=\"margin: 0 0 8px;\">List the actual service conditions: load type, magnitude, temperature, and exposure.<\/li>\n<li style=\"margin: 0 0 8px;\">Pick the minimum alloy that meets strength and corrosion requirements \u2014 not the maximum.<\/li>\n<li style=\"margin: 0 0 8px;\">Check castability and section thickness against the alloy (thin walls favor ductile iron, aluminum, or zinc over gray iron).<\/li>\n<li style=\"margin: 0 0 8px;\">Estimate total cost including yield and machining, then compare per part \u2014 not per kilogram.<\/li>\n<li style=\"margin: 0 0 8px;\">Confirm the grade against the relevant <a style=\"color: #086ad4; text-decoration: none;\" href=\"https:\/\/www.astm.org\" target=\"_blank\" rel=\"noopener\">ASTM<\/a> specification and lock it into the drawing.<\/li>\n<\/ol>\n<p style=\"margin: 0 0 18px;\">When the choice is genuinely close, a foundry with in-house pattern, casting, and machining can produce short-run samples in two candidate alloys so you can measure cost and performance before committing to full production.<\/p>\n<h2 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 25px; font-weight: 600; line-height: 1.3; margin: 34px 0 14px; padding: 4px 0 4px 30px; background: linear-gradient(to right, #ff512f 0px, #dd2476 5px, transparent 5px);\">FAQ<\/h2>\n<h3 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 20px; font-weight: 600; line-height: 1.4; margin: 22px 0 8px;\">What is the cheapest cast alloy for a non-corrosive structural part?<\/h3>\n<p style=\"margin: 0 0 18px;\">Gray iron is typically the lowest-cost option for non-corrosive structural and vibration-damping parts. Ductile iron is the next step up when the part needs more strength and some ductility at a still-low cost.<\/p>\n<h3 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 20px; font-weight: 600; line-height: 1.4; margin: 22px 0 8px;\">When should I choose stainless steel over carbon steel?<\/h3>\n<p style=\"margin: 0 0 18px;\">Choose stainless when the part sits in wet, marine, chemical, or high-temperature service where carbon steel would corrode or scale. For dry indoor structural use, carbon steel or ductile iron is usually the more economical choice.<\/p>\n<h3 style=\"font-family: 'Poppins',sans-serif; color: #273171; font-size: 20px; font-weight: 600; line-height: 1.4; margin: 22px 0 8px;\">Is aluminum always lighter and cheaper than iron?<\/h3>\n<p style=\"margin: 0 0 18px;\">Aluminum is always lighter, but not always cheaper. It can beat iron on total cost when weight savings reduce material, machining time, and shipping; for a heavy, low-volume structural casting, iron is usually more economical.<\/p>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"3550\" class=\"elementor elementor-3550\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-19b1acf1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"19b1acf1\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-56e26ed6\" data-id=\"56e26ed6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-52c3d00c elementor-widget elementor-widget-elementskit-heading\" data-id=\"52c3d00c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Szukasz niezawodnej odlewni metali w Chinach?<\/h3><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24c75aa0 elementor-widget elementor-widget-text-editor\" data-id=\"24c75aa0\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Mo\u017cemy pom\u00f3c Ci zoptymalizowa\u0107 projekt produktu i obni\u017cy\u0107 koszty.<\/li><li>Mo\u017cemy pom\u00f3c Pa\u0144stwu w zakresie wysokiej jako\u015bci odlew\u00f3w produkowanych w du\u017cych ilo\u015bciach.<\/li><li>Mo\u017cemy dostarczy\u0107 na czas i zyska\u0107 wi\u0119cej mo\u017cliwo\u015bci rynkowych sprzeda\u017cy.<\/li><li>Skorzystaj z us\u0142ug odlewniczych firmy Supro MFG.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-51a20937 elementor-align-left elementor-widget elementor-widget-global elementor-global-1143 elementor-widget-button\" data-id=\"51a20937\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/chinametalfoundry.com\/pl\/kontakt\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Popro\u015b o wycen\u0119 bezpo\u015brednio od producenta <\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t\n<p class=\"sc-note\" style=\"font-size: 13px; color: #9a9a9a; margin: 28px 0 0;\">*Tensile figures are typical ASTM specification minimums and vary by grade and section thickness. Confirm final grades with AFS \/ ASTM references and your foundry&#8217;s in-house records.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>The most expensive mistake in metal casting is not a bad mold or a wrong tolerance \u2014 it is picking [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":7667,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[15],"tags":[46,50,42],"class_list":["post-7666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs","tag-casting-materials","tag-casting-selection","tag-metal-casting"],"_links":{"self":[{"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/posts\/7666","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/comments?post=7666"}],"version-history":[{"count":5,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/posts\/7666\/revisions"}],"predecessor-version":[{"id":7674,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/posts\/7666\/revisions\/7674"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/media\/7667"}],"wp:attachment":[{"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/media?parent=7666"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/categories?post=7666"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chinametalfoundry.com\/pl\/wp-json\/wp\/v2\/tags?post=7666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}